Steps

Four minutes, start to finish

Copy the URL from your store's settings, then Connectors, External LLM Access.
Add the server to ~/.cursor/mcp.json for every project, or .cursor/mcp.json for one. The URL is all it needs.
Open Cursor's MCP settings and log in to the server: your browser opens on the BoostEcom consent screen, where you approve the scopes.
Check the server is listed as connected, then ask about the store: the agent calls the tools directly, no glue code.

Replace <STORE_ID> with your store id. The dashboard shows the same URL fully resolved, next to the key.

Cursorjson

OAuth 2.1

{
  "mcpServers": {
    "boostecom": {
      "url": "https://www.boostecom.app/api/mcp/v1/<STORE_ID>"
    }
  }
}

Gotchas

What bites

The endpoint is per store, so two stores are two entries in mcp.json: give them distinct names or the second silently replaces the first.
A static key never passed a consent screen, so it opens the relay and nothing else: the 15 read-only Shopify tools, within what you granted the BoostEcom app. The documentation tools, Studio and your store's intelligence record need the OAuth sign-in. On a machine with no browser, add a headers entry with Authorization: Bearer and the key, and keep it in the global ~/.cursor/mcp.json: a project file tends to end up in git.

Other clients

3 other clients, tested end to end